Book: Sites.google.com. 2015. What are the different types of serial killers? - Psychology of Psychopaths 2a. [Internet]. Available from: https://sites.google.com/site/psychologyofpsychopaths2a/what-is-the-profile-of-a-serial-killer-1/what-are-the-different-types-of-serial-killers?hc_location=ufi